Describe firstStep variable

src/components/GiftedDialog.vue

@@ -577,7 +577,7 @@ export default class GiftedDialog extends Vue {
   callbackOnSuccess?: (amount: number) => void = () => {};
   customTitle?: string;
   description = "";
-  firstStep = true;
+  firstStep = true; // true = Step 1 (giver/recipient selection), false = Step 2 (amount/description)
   giver?: libsUtil.GiverReceiverInputInfo; // undefined means no identified giver agent
   offerId = "";
   prompt = "";